Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 353
and 8 show the distribution oflight from a single-loop filament of cylindrical cross-section. 294 ELECTRIC LIGHTING 13 Fig. 7 shows the distributiou of light in a horizontal phme, thelamp being monuted in a vertical position, and Fig. 8 shows tliedistribution in a vertical plane. By changing the… … Fig. 8. assumed for the ordinary incandescent lamp. A mean of theIeadings taken in a vertical plane gives us the mean verticalcandle-power, but this value is of little use. Hean Spherical Candle=Power. AYhen comparing lampsvvhich give an entirely different light distribution, ♦^he mean horizou- 295…
Architecture · Building · Carpentry
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